Dynamo-electric machine



May 5, 1925. 1,536,279

Y v V. G. APPLE DYNAMO ELECTRIC MACHINE Filed May' 27, 1920 4747. J0 j i 2 44 I W 10' @f9.1

. Electric Machines,

rby su Patented May 5, 1925.

UNITED STATES VINCENT G. APPLE, 0F DAYTON, OHIO.

DYNAMIC-ELECTRIC MACHINE.

Application filed May 27,1920. Serial No. 384,574.

Tol all whom t may concer/n.'

Be it known that I, VINCENT G. Arrnn, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Dynamoof which the following is a specification.

This invention relates to improvements in dynamo electric machines, and has especial reference to alternating current motors.

One of the objects of the invention is to provide a rotor, of such machines, freely rotatable on its axis independently of the load, and improved means, responsive to the speed thereof, to automatically connect itto its load when its reached.

Another and more specific object is to provide a hollow rotor and locate the speedresponsive connecting means therein to economize space.

Another object is to provide a simple, durable, automatic and eiiicient connecting means, sensitive in operation, so that itwill perform its intended functions within a very small range of speed variationA or at a very critical speed and which provides ,a fric'- tional connection, having large frictional surfaces, sufficiently positive .for all operative urposes but yieldable to a safe extent iden application of overload.

Another object is a means for increasing the heat radiating surfaces.

Another object is to provide a self-contained rotor and speed-responsive-connecting-means that will not become disarran'ged predetermined speed is when the rotating structure is removed from the field, or stator. y

Another object is to im rove the means of ventilation to disperse eat that may be en endered in the electro-magnetically actlve parts of the device. l

Other, vfurther and more specific objects of the invention will become readily apparentv from a consideration of the following `description when takenin conjunction withl the drawings, wherein v Fig. 1 is a central section of the motor.

Fig. 2 is an end view.

Fig. 3 is an end view plates or heads removed.

Fig. 4`is a section through an end plate taken on line 4--4 of Fig. 2. i

Fig. 5 is a detail view of two ofthe disks constituting parts of the clutch mechanism.

porting. Driving pins 22 nations 17, so as to rotatably with one of the end In all the views the same reference characters are employed to indicate similar parts.

In the drawings 10 is the stator, and 11 is a rotor of the dynamo-electric-machine. The stator has a laminated eld 12, composed of rin s 13 of sheet iron,'and alternate rings 14. T e rings 13 are of larger diameter 'to project beyond theperipheral edges of the rings 14 for the purpose of providing air spaces for larger heatradiating surfaces to disperse the heat that may be engendered by the magnetic changes inthe core. 15 is one head of the structure and 16 is the other. p

The rotor 11 is provided with a laminated core 17 and windings 18 in the usual form. The rotor also has end plates 19 and 20, each having a hub 21. The laminations 17, of the rotor, are preferably, cemented together by a phenolic condensation product so that the core 17 is substantially self 'supare passed through the heads 19 and l20 into the lamisecure the parts 19 and 20 to the core. The sleeves 21 of the rotor are connected to bearing sleeves 24 that are rotatable on the shaft 25. The inT ner ends of the sleeves are hardened to provide bearings for the balls 26. A series of clutch disks 29 are mounted on a hub 28 and are rotatable therewith. The discs 29 are round in form and alternate with discs 30, that are, preferably, rectangular in form as more clearly shown in Fig. 5. Bolts 31 pass through the heads 19 and 20 and thru the square. discs 30, thru holes 32 in their respective corners of the discs '30, there bein four bolts disposed as shown in Fig. 3. e hollow cone-shaped member, 33 having a hub portion 34, is slidable on the hub 28, and its inner edge bears against a disc 35 so, that when the cone member 33 is 'with t e inner surface of the head 19 and the inclined surface of the cone.

Now, it `will be manifest that vwhen a critical speed is reached, the balls 26 will fiy outwardly on the inside edge of thecone portion 33 and thereby press the discs-.together a inst the resilient effect ofthe springs 3 The centrifugal eilectfof' the balls is suicientt'o some extent to overcome `the effect of the sprmgs 37, which are coiled around each of the bolts 31, at the time Whenso that then the rotor` will be connected to shaft 25, as the hub 2S is connected thereto v by means ofthe key 39.

The end plates or heads are each provided with an opening 40 and an inner shield portion 41. The edge 42 of the latter extends above the 'edge Figs. 2 and 4. The rotation of the `member 11 draws air in through the opening-I4() and causes it to clrculate in and around magnetically activel and electric conducting,-

from whence 1t may escapebyv portions openings 44 that may be made inzthef out rim of the heads.

Boltsv 45 pass thru' Vth `disks rotatable thereon;

a substantially closed 43, as more clearly shown in p nating `,'.fn in, the. pins 'and v centrifugally operable means Scribe'nini-fname heads 15 and 16 and thru thelarninationrg,A .i l,

12. Instead of using the headed'rodsfll,

the laniinations 12 may be cemented together in the manner heretofore Having describedmy'A invention 'what I claim as new and desire to ysecure by LettersA yPatent is l l. v

described;A

A device of the characterv described corn; f

prising a rotatable shaft; a pair of spaced near the periphery of the disksjfto provide housingto prevent .en-

a ringlconnected f trance of foreign matter therein; a'pair' of pins lpassing thrul the disks and` substaiitially parallel with the shaft: a serieslof, axially movable flat rings supported. on.

the pins; a 'series of axially 'movable yfiat position with the flat rings on within the closed housing 'to press said liet ing. andr the-shaft'. i

nia-testimony whereof hereunto sub' "VINCENT e. APPLE, -1

rings--rotatablevvith the shaft v'and alter- 

